Heney hufendeck



't @with tapes' ste-nt @Hita HENRY HUFENDEOK, OF ST. LOUIS, MISSOURI, ASSIGN ORTO S. R. FOX;

E. G. PRATT, AND E.' W; FOX, OF SAME PLACE.

Letters Patent No. 60,895, dated January l, 1867; autedated December 12, 1865.

IMPRovi-:D- DRILL.

@its tlgshnle nimh tu im that when gzrtnxt ma uniting part si tigt time.

TO ALL WHOMIT MAY' CONCERN:

Bye it known that I, HENRY:V HUFENDEGK, of the city and county of St. Louis, and State of Missouri, have invented a new and improved Drill g and I do herebydeclarel that the following is a full aud enact descrip- Tion thereof, reference being lia-d to the accompanying drawings, and to the letters of-reference marked thereon. 0f said drawings- I Figure'l is a perspective view ofl ,said drill. p

Figure 2 is a' front elevation thereof', showing in red-lines the possible change of gear-Wheels and drivingpulley.

-The nature of my invention is in the peculiar construction of a drill for general Work, and especially in the arrangement of the parts where the power is applied, so as to admit of an application of a. constant power and a constant velocity, to produce a varied power and varied velocity of the drill tool proper to the nature and size of the substance to be drilled.; and lastly, the nature ol my invention is the arrangement of a changeable support for the substance to be worked upon.

To enable those skilled in the art to make and use my saidimproved l drill, I will herewith proceed to describe its construction and operation.

I'construct the parts of said drill of wrought and 'cast iron, or of brass or other material, varying the material accordingto the size of the drill itself,`soas to produce thel greatest eiliciency by the most economical outlay of cost. The worhingjparts of said drill' are supported by the support A. This isusually cast iron and secured in a vertical position to a vertical post of the Workshop or a wall of" the same; but said support A may sometimes be horizontal, becoming then a bed-plate, secured by screws, bolts, or other suitable means, to a door of the Workshop. This support A has three bearings,` a, al, and a2, for the drill-shaft and its connections. The drill-shaft B isusimply held in a vertical position by the bearings a and al. This shaft is usually wrought iron, and is turned by the bevel-wheel C or the bevelovheel C. The shaft B, furthermore,'is moved in a vertical direction, so as to gradually lower down to the substancewhich is being drilled, or produce the so ealled feed of the drill by meaus'of a screw, b. The drill-shaft has at its lower end a socket, b, for the insertion of the drill-tool, made and arranged in the usual manner. The feed-screw b finds a bearing,r on the support A at a2, which is here arranged as a nut for said screw. This screwuisurned by the hand-Wheel bl, and at its lower end has a swivel-head turning in lthe upper end of the drill-shaft b2, so that by turning said hand-Wheel b1, and thereby turning said feedscrew @the drill-shaft B is raised or lowered. This feed arrangement may, however, consist ola feedshaft, (instead of' said feed-screw,) and a lever to actuate said feed-shaft, (instead of said hand-Wheel 51,) or of any other easily suggested practical ari-angeinent. Said bevel-wheels@ and C are secured to said drill-shaft B- by means ofva'feathcr moving ina vertical slotfof said drill-shaft, so that said bevel-wheels may always find a support on the upper surface offsaid bearing a and still aetuate said drilleshai't and permit thefeed motion thereof, as above described. The 'bevel-wheels C 'and C are turned by the bevel-wheel D and D', being on thesame shaft, E, With the` drivingwheel F"said wheel F being either a ily-wheel with hand-crank, so that man power can actuatethe machine, or a simple pulleyover 'which the belt passesand to'whicb thebelt transmits power from the given power sources. IIoyveveL-if the beltand pulley be used in 4operating this'drill it will be advantageous to tighten the belt by a' simple Weight-roller, so that by raising this Weight-roller an 'extension of the belt can be made to correspond with the changes'oi' position oi' the driving-pulley, (corresponding to the wheel F,) as will yet more particularly be described. i. The shaft E iinds a bearing in the support Gr, which bolts on to the main support-plate A, at g and gl, when the bevel-Wheels C and D are in gear 4with each other. Now, as the pinion Cris comparatively small, it will be seen that in this arrangement a high speed 0f the drill-tool is attainedwhich for certain classes of Work is preferable. In order 'that whenever a ehangeoi1 the Worked substance makes it necessary, a loiver speed of drill-tool be attainable, (and with the same speed of the main driving-Wheeler pulleyrFQ the bearing G is shiftedairom the position marked in black lines, G, to the one markedA in red lines, .(iig. 2,) G then the shaft E is lowered to the`.position red E', whereby, as above stated, the belt tunning a pulley at F would need Aa re-ad justmeut; then the bevel-wheel C is placed in gear with the bevel-pinionpDQ'and as the pinion Cislarger than C, and, moreover, as the driving-.wheel D is smaller than the driving-wheel D, it is plain that by thus changing the shaft bearing, shaft, and wheelsifrom 'the firsty described 'into the second position shown in red figures and lines in fig. 2 of the drawing, the speed of .the drillftool is moderated. It is claimed that especially in drills propelled and actuated by hand this arrangement for. changing the speedof the drilltool makes it possible to use one drill,- when withoutv my said arrangement two drills would'become necessary; it bccomes,'th'erei`ore, apparent, that by the introduction'of this practicable feature there is, especially for hand drills," hereeifceted a valuable improvement. l In order that the shifting and securing ci the shaft hearing G to its other position,y red G', mayat all times be speedily accomplished, the securing-screw-bolts are fixed in the main support A, at the necessary points, towit, in correspondence with the position G, at g and g1, inv correspondence with the .position red G at g and gl red. In order to support 'the materialfto be drilled, I secure' just below the drill-tool the drill-tahle H. This table consists'cf several parts, to Wit, of a bedlplate, 7L, which-is secured in like manner with the main support of the machine A. This plate L basa grooved way, h1, in which the table proper, z', has a vertical sliding motion, the said motion being limited toa merely vertical one by the flange pieces 7i, bordering the groove L on h. The table z' is held permanently in any desired vertical distance from the drill-tool by the set-screw and nut K. Thus, by sliding t' up or down, and then securing itby the set-screw and nut K, any usual size or" the material to be drilled is accommodated. The table z' may be arranged in variable shapes; the

.one-shown is designed to furnish conveniences for drilling the necessary spike holes for wagon tires. The spoke of the wheel then passes between the arms c" and z'z 'of' said table, whereas the wheel rim rests its under (and inner) surface directly upon the arms if anda?. In the many uses towhich my said drill may he applied the shape of the table i will be varied, suited to each specific use, bntI especially claim that by providing' the way h between the flanges 7L, for the reception 'of the vertical end piece of the table, and the set-screw and nut K, furthe holding thereof properly, I have formed an improved arrangement.

Having thus described my invention, what I claim, is- 1. The combination of two or more sets of' corresponding bevel gearfwheels, arranged substantially as shown by C and D, C and D', with the changeable shaft support, when used as set forth.

2. The combination of the feed-screw Z1 and its actuating hand-wheel b, or their ecpiivalents` with'the drillshaft B, allsuppcrted in thcbearings a, al, and a? of A, in combination with the several sets of corresponding bevel gear-wheels C and D, C' and D, itc., the changeable shaft support G, and the work-table H, as set forth,

i HENRY IIUITEIQDECK. Witnesses;

M. RANDOLPH, A.V WAonnn, 

